Hi,
You should activate the option "Include virtual products price" in order to include all extra prices in the price limitation.
Otherwise it will just use the product price that you have to ship ; and it won't take in consideration the coupon (which is applyed on the order).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.